https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13961668Edit ImageSaveSaveEditCropCustom TextAcoustics: an Edison phonograph with a carbon microphone. Coloured wood engraving after J.T. Balcomb.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 785 x 1200 px | 300 dpiLarge JPEG 2138 x 3270 px | 300 dpiFree DownloadAcoustics: an Edison phonograph with a carbon microphone. Coloured wood engraving after J.T. Balcomb.More